For the last 10 years, American artist Ra Paulette has been walking alone into New Mexico's desert to work. He spends his time carving a sandstone cave that he found, turning it into a wonderful subterranean space full of light.

The Badlands region in the American West is famous (or infamous) for its arid and unforgiving landscape, which is decorated by sharp and eroded spires of stone. If you catch it at just the right moment and in the right conditions,...